Journal of the Turkish Chemical Society Section A Chemistry,
Journal Year:
2024,
Volume and Issue:
11(3), P. 1099 - 1110
Published: July 13, 2024
In
the
study,
structural
and
dielectric
properties
of
Ba2GdMO6
(M=Nb,
Ta)
double
perovskite
ceramics
produced
with
solid-state
method
were
examined
by
co-doping
xEu3+
yB3+
(x=10
mol%,
y=0,
5,
15,
30,
50,
70
100
mol%).
XRD
(X-ray
diffraction)
results
ceramic
samples
exhibited
a
single-phase
structure
cubic
symmetry
Fm-3m
space
group,
while
increasing
B3+
concentration
led
to
an
increase
in
crystallite
sizes
lattice
parameters
up
50
mol%
both
series.
SEM
(scanning
electron
microscopy)
examinations
revealed
presence
boron-supported
grain
growth
agglomeration
grains
series,
also
slight
angularity
occurred
shape
at
high
concentrations.
The
constant
(ε')
series
increased
boron
it
was
approximately
33.5
35.4
20
Hz
for
Ba2Gd1-xNbO6:xEu3+,
Ba2Gd1-xTaO6:xEu3+,
yB3+,
respectively.
decrease
after
may
be
attributed
strain
structure,
as
shown
size.
caused
loss
(tan
δ)
which
suppression
oxygen
vacancies
due
hence
ionic
conductivity
loss.
Molecules,
Journal Year:
2025,
Volume and Issue:
30(7), P. 1569 - 1569
Published: March 31, 2025
In
order
to
break
through
the
limitations
of
application
traditional
temperature
measurement
technology,
non-contact
optical
sensing
material
with
good
sensitivity
is
one
current
research
hotspots.
Herein,
a
series
Dy3+
and
Mn4+
co-doping
Mg3Ga2SnO8
fluorescent
materials
were
prepared
successfully,
crystal
structure,
phase
purity,
morphology
synthesized
phosphors
comprehensively
investigated,
as
well
their
photoluminescence
properties,
energy
transfer,
high-temperature
thermal
stability.
The
two
pairs
independent
thermally
coupled
levels
ions
in
are
utilized
realize
dual-mode
detection
excellent
performance.
On
hand,
based
on
different
ionic
level
transitions
4F9/2→6H13/2
2Eg→4A2g
responding
differently
temperature,
emission
bands
577
nm
668
chosen
construct
fluorescence
intensity
ratio
thermometry,
maximum
1.82
%K−1
was
achieved
at
473
K.
other
strong
dependence
lifetime
Mg3Ga2SnO8:0.06Dy3+,0.009Mn4+,
thermometry
constructed
2.75
Finally,
Mg3Ga2SnO8:
0.06Dy3+,0.009Mn4+
sample
realizes
high
wide
range,
indicating
that
has
promising
applications
measurement.
Molecules,
Journal Year:
2025,
Volume and Issue:
30(9), P. 1945 - 1945
Published: April 27, 2025
In
recent
years,
rare
earth
ion
and
transition
metal
co-doped
fluorescent
materials
have
attracted
a
lot
of
attention
in
the
fields
WLEDs
optical
temperature
sensing.
this
study,
I
successfully
prepared
dual-emission
Mg3Ga2SnO8:Eu3+,Mn4+
red
phosphors
XRD
patterns
refinement
results
show
that
belong
to
Fd-3m
space
group.
The
energy
transfer
process
between
Eu3+
Mn4+
was
systematically
investigated
by
emission
spectra
decay
curves
Mg3Ga2SnO8:0.12Eu3+,yMn4+
(0.002
≤
y
0.012)
maximum
value
efficiency
can
reach
71.2%.
Due
weak
thermal
quenching
effect
Eu3+,
its
provides
stable
reference
for
rapid
peak,
thereby
achieving
good
measurement
performance.
relative
thermometric
sensitivities
fluorescence
intensity
ratio
lifetime
methods
reached
2.53%
K−1
at
448
K
3.38%
473
K.
addition,
utilizing
Mg3Ga2SnO8:0.12Eu3+
phosphor
high
color
rendering
index
82.5
correlated
6170
electroluminescence
spectrum
synthesized
LED
device
Mg3Ga2SnO8:0.009Mn4+
highly
overlaps
with
absorption
range
phytochrome
PFR
thus
effectively
promote
plant
growth.
Therefore,
application
prospects
WLEDs,
sensing,
growth
illumination.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(33), P. 15388 - 15397
Published: Aug. 9, 2024
Currently,
developing
luminescent
materials
for
dual-mode
optical
thermometry
has
been
becoming
a
rising
topic,
and
concurrent
temperature-sensitive
parameters
hold
the
key.
Still,
it
is
serious
challenge,
since
distinct
activators
are
generally
needed
energy
transfer
(ET)
processes
among
inevitably
occur,
further
leading
to
severe
luminescence
quenching.
Herein,
spatial
separation
strategy
proposed
designing
dual-phase
glass
ceramics
(GCs)
containing
ZnGa2O4:Cr3+
NaYF4:Yb3+,Er3+
nanocrystals
(NCs)
thermometry,
in
order
integrate
diversified
into
one.
Structural,
morphological,
characterizations
examined
verify
partition
of
Cr3+
ZnGa2O4
Er3+
NaYF4
lattice
GC.
Benefiting
from
such
strategy,
adverse
ET
between
could
be
cut
off
GC,
contributing
downshifting
(DS)
upconversion
(UC)
luminescence.
Furthermore,
performed
based
on
lifetime
fluorescence
intensity
ratio
(FIR)
Er3+,
with
high
relative
sensitivities
0.95%
K–1@450
K
1.24%
K–1@303
K,
respectively.
It
evidenced
that
GC
holds
great
potential
this
work
also
offers
prospective
pathway
expanding
practical
applications
materials.
